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The PMAG 20 GEN M3 is your go-to choice if you want a shorter mag without giving up anything in reliability. Whether you're shooting from the bench, running prone with a bipod, or just want something that fits better in tight pouches, this 20-rounder delivers the same battle-tested performance as the full-size 30-round version in a more manageable package.
Magpul didn't just shrink the 30-round design here. They updated the polymer material itself to be tougher and more impact-resistant than earlier generations. The magazine is built to survive hard use, drops, and extreme temperatures without cracking or losing its feed geometry. The feed lips stay reinforced, the constant-curve internal geometry keeps rounds feeding smoothly regardless of how dirty things get, and the anti-tilt follower self-lubricates so everything cycles without friction.
This mag works across a wide range of platforms beyond just your standard AR-15. Thanks to redesigned internal and external geometry, it'll function in HK 416 rifles, M27 IAR, FN SCAR, and other modern platforms. There's a redesigned bolt catch notch that gives better clearance, and the over-insertion stop keeps you from jamming the magazine too far into the well. The flared floorplate is slightly slimmer than older designs, so it actually stacks better in double and triple pouches if you're running a battle belt or chest rig. Strip it down with no tools needed to clean it, mark the dot matrix panels on the bottom for quick ID, and you're set.
You get all the strength of the full-size PMAG in a 20-round profile. That matters when you're shooting from a bench rest where a 30-rounder stands up too high, or when you're going prone where every extra inch of magazine sticking up gets in your way. Multiple users consistently mention this is the sweet spot for those applications, and the aggressive texture up front and back keeps it controllable even with gloves on.
Yes, it's optimized for Colt-spec AR-15 and M4 platforms. The modified geometry also makes it compatible with a wide range of other rifles like the HK 416, M27 IAR, and FN SCAR. One thing to note: a small percentage of billet lowers have tight magazine wells that may require slight filing of the over-insertion stop, but this is rare and only affects about 1% of rifles.
The GEN M3 uses upgraded polymer that's more impact-resistant and durable. It has an over-insertion stop to protect your magazine well, better grip texture for gloved use, a paint-pen dot matrix for easy marking, and improved compatibility with non-Colt-spec platforms. The four-way anti-tilt follower and constant-curve internal geometry feed reliably in extreme conditions, and the whole design has been field-tested extensively.
Absolutely. The 20-round profile is a game-changer for bench shooting and prone work with a bipod because the magazine doesn't obstruct your sight picture or get in the way when you're tucked down. It's also slimmer and stacks better in magazine pouches, making it popular for tactical loadouts. You get full PMAG reliability in a more manageable size.
The floorplate flares outward and comes off with no tools needed. Pop it off, dump out any debris, and give the inside a wipe if needed. The anti-tilt follower is self-lubricating, so you don't need to add anything. Just put it back together and you're done. The polymer construction means no corrosion issues unlike metal magazines.
| UPC | 873750007915 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | MAG560-BLK |
| Action | |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Capacity | 20 |
| Color | Black |
| Model | |
| Model Fit | AR-15 |
| Product Type | Magazine |
| Quantity | 1 |
| Shipping Weight | 0.29 |
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